Solar Air-conditioning System Using Single-Double

Solar Air-conditioning
System Using Single-Double
Effect Combined Absorption
Chiller
Hajime Yabase,
Kawasaki Thermal Engineering Co., Ltd.
[email protected]
Kiyoshi Saito,
Waseda University
[email protected]
Muhammad Idrus Alhamid,
University of Indonesia
[email protected]
１．Solar System
The efficiency of Solar Thermal is better
than that of Photovoltaic.
Efficiency of Solar Energy
Photovoltaic : 10%
<
Solar Thermal : 40%
(in case of utilizing Hot Water)
From HP of NEDO
http://app2.infoc.nedo.go.jp/kaisetsu/neg/neg02/index.html#elmtop
2. What’s Absorption
Chillers?
Cooling tower
☆Special Feature
Cooling
water
① Freon-Free air conditioning
machine (Refrigerant = Water )
② Much less power consumption
than electric chiller.
Air
Handling
Unit
(AHU)
Chilled
water
Absorption
Chiller
③ Various Energy Sources can be
utilized.
2. What’s Absorption
Chillers?
Energy Use Composition in Buildings in Japan
Water Supply &
Drainage
Elevator
Machinery
For Air Conditioning: 43%
Others
Air Conditioning
Ventilation
Water
Transport
Hot Water
Electric Device
Lighting
Air
Transport
By HP of The Energy Conservation Center, Japan
3. Solar Cooling
Applications
Conventional System
Cooling tower
From NEDO/HP
Collector
Storage tank
Cool wind
Back-up
Chilled water
Boiler
Absorption chiller
5
1. Complicated system with a boiler for the back-up of hot
water supply
2. Complicated control system to adjust hot water supply in
accordance with the fluctuation of load and solar heat Low
3. efficiency of absorption chiller(single effect)
3. Solar Cooling
Applications
Improveent System
Absorption Chiller(Combined)
Single & Double Effect
6
1. Absorption chiller has a back-up system and no boiler
2. Absorption chiller is automatically moved to combustion for the stable supply
High
3. of chilled water
efficiency of absorption chiller (Double Effect)
3. Solar Cooling
Applications
Solar Cooling System at our
Shiga factory
Solar Heat Collector
(evacuated tube type)
Air conditioning for this office
Solar Hybrid Chiller
3. Solar Cooling
Applications
Evaluation status and results in Shiga (1)
thermal energy collection (kW)
cooling output (kW)
heating output (kW)
solar radiation (W/㎡)
200
1000
400
50
 Max temp : 28.4ºC ,
air-conditioning loading
factor :23%
0
0
6
7 8 9 10 11 12 13 14 15 16 17 18 19 20
gas input (kW)
thermal energy use (kW)
solar thermal (℃)
outside (℃)
(hour)
250
 hot water obtained from
the solar energy collector
is used at 60～83℃
100
75℃
60℃
200
kW
 Enabled gas amount to be
reduced by 25%
200
150
80
60
100
40
50
20
0
0
(hour)
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
℃
kW
 20th May
600
100
W/m2
800
150
3. Solar Cooling
Applications
Evaluation status and results in Shiga (2)
 28th July
500
1200
400
1000
800
300
600
200
400
100
200
0
 Max temp : 34.5ºC ,
air-conditioning loading
factor :60%
 Enabled gas amount to be
reduced by 11%
0
6
7 8 9 10 11 12 13 14 15 16 17 18 19 20
gas input (kW)
thermal energy use (kW)
solar thermal (℃)
outside (℃)
(hour)
500
100
75℃
60℃
400
kW
 hot water obtained from
the solar energy collector
is used at 60～75℃
W/m2
heating output (kW)
solar radiation (W/㎡)
300
80
60
200
40
100
20
0
0
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
(hour)
℃
kW
thermal energy collection (kW)
cooling output (kW)
3. Solar Cooling
Applications
Solar Cooling System in University of Indonesia (UI)
is started from Jan. 2014
“Entrusted business on the technical cooperation for co-benefit type solaraided air-conditioning system in Indonesia during the fiscal years 2013.”
sponsored by Ministry of Environment Japan.
This project includes detail designing of a solar cooling absorption chiller system
utilizing solar energy with the prospect that the system prevails and expands in
Indonesia, and includes studying measures for growth of the system in
Indonesia by holding a local workshop and a year-end progress meeting.
Cooling
Hot water tank
Solar heat collector
New Building of
University of Indonesia
Hybrid chiller
Fuel
Office
3. Solar Cooling
Applications
Verification of the effect relating to verification test of a
solar cooling absorption chiller system utilizing solar
energy in UI (1)
Comparison equipment specification
Comparison between solar absorption chiller and conventional chiller【RP basis】

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